Non Korean users, but the notification of PC Xbox app is in Korean

That's odd. If you try to change your region to US, for example, it changes to English or is it stay Korean?

Hello dear Gamer, first it's a pleasure to be able to help you today.

My name is Vinicius.

I am a gamer and independent advisor on the XBOX community platform.

Hey Tjxgame, how are you today? Hope you're well.

Xbox App uses the language that you have assigned as your preferred Windows language. In order to change that, search for "Language" (type this in your Windows language if you're not using the English version) in the search bar on Windows, and then the language panel will come up. (It's the same panel you use if you want to change keyboard preferences) The language, which is in the top, is the one that the Store and all its apps use. Just get the language you prefer in the first spot and the Store along with all the apps and your keyboard will use this as preferred language.

That's odd. Have you try to reinstall the app to see if this possible bug get fixed?

I've tried to remove and reinstall Xbox apps, but it still doesn't solve the problem

Thank you for your reply, but in my language setting, simplified Chinese is already the top language, and the second is English. No Korean.